HEK293T cells were transfected with the pCMV6-ENTRY control (Cat# PS100001, Left lane) or pCMV6-ENTRY E2F4 (Cat# RC207699, Right lane) cDNA for 48 hrs and lysed. Equivalent amounts of cell lysates (5 ug per lane) were separated by SDS-PAGE and immunoblotted with anti-E2F4 (Cat# TA811691)(1:500). Positive lysates [LY400717] (100 ug) and [LC400717] (20 ug) can be purchased separately from OriGene.